Bürgerkonten und das Projekt „The Once-Only Principle” [Online Ausgabe]Krimmer, Robert Johannes; Fischer, Dirk-Hinnerk; Schmidt, CarstenPublic governance : Zeitschrift für öffentliches Management2017 / p. 12−15 : ill https://publicgovernance.de/media/PG_Herbst_Winter_2017_Digitale%20Verwaltung_Behoerden_unter_Handlungsdruck.pdf

Chancen und Anforderungen des Single Digital GatewaysKrimmer, Robert Johannes; Schmidt, CarstenInnovative Verwaltung2019 https://doi.org/10.1007/s35114-019-0163-x

Developing cross-border E-governance: exploring interoperability and cross-border integrationKrimmer, Robert Johannes; Dedovic, Stefan; Schmidt, Carsten; Corici, Andreea-AncutaElectronic participation : 13th IFIP WG 8.5 International Conference, ePart 2021, Granada, Spain, September 7–9, 2021 : proceedings2021 / p. 107-124 : ill https://doi.org/10.1007/978-3-030-82824-0_9 Conference proceeding at Scopus Article at Scopus Conference proceeding at WOS Article at WOS

Digitalisierung und E-Health in EuropaKrimmer, Robert Johannes; Fischer, Dirk-Hinnerk; Schmidt, CarstenDie Ersatzkasse2018 / s. 36-37 https://www.vdek.com/magazin/ausgaben/2018-0506/titel-europa.html

Drivers for and barriers to the cross-border implementation of the once-only principleLeosk, Nele; Põder, Ille; Schmidt, Carsten; Kalvet, Tarmo; Krimmer, Robert JohannesThe once-only principle : The TOOP project2021 / p. 38–60 https://doi.org/10.1007/978-3-030-79851-2_3 Collection metrics at Scopus Article at Scopus Collection metrics at WOS Article at WOS

Ein dynamisches Umfeld : Aktuelle Entwicklungen zu E-Justice in Deutschland und Europa [Online recource]Schmidt, Carsten; Krimmer, Robert Johannes; Fischer, Dirk-HinnerkE-justice2018 / p. 3-6 https://www.e-justice-magazin.de/

How to implement the European digital single market : identifying the catalyst for digital transformationSchmidt, Carsten; Krimmer, Robert JohannesJournal of European Integration2022 / 21 p. : ill https://doi.org/10.1080/07036337.2021.2011267 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

The once-only principle : a matter of trustKrimmer, Robert Johannes; Prentza, Andriana; Mamrot, Szymon; Schmidt, CarstenThe once-only principle : The TOOP project2021 / p. 1-8 https://doi.org/10.1007/978-3-030-79851-2_1 Article collection metrics at Scopus Article at Scopus Article collection metrics at WOS Article at WOS

Reaalajamajanduse alused ja rakendusvõimalused : uuringu lõpparuanne [Võrguväljanne]Krimmer, Robert Johannes; Kadak, Tarmo; Alishani, Art; Toots, Maarja; Soe, Ralf-Martin; Schmidt, Carsten2019 https://www.mkm.ee/sites/default/files/taltech_rte_lopparuanne_ee.pdf

Real-time economy : Definitions and implementation opportunities : Final research report [Online resource]Krimmer, Robert Johannes; Kadak, Tarmo; Alishani, Art; Toots, Maarja; Soe, Ralf-Martin; Schmidt, Carsten2019 https://www.mkm.ee/sites/default/files/taltech_rte_final_report_en1.0.pdf

The future of the once-only principle in EuropeKrimmer, Robert Johannes; Prentza, Andriana; Mamrot, Szymon; Schmidt, Carsten; Cepilovs, AleksandrsThe once-only principle : The TOOP project2021 / p. 225–236 https://doi.org/10.1007/978-3-030-79851-2_12 Article collection metrics at Scopus Article at Scopus Article collection metrics at WOS Article at WOS

“When need becomes necessity” - The single digital gateway regulation and the once-only principle from a European point of viewSchmidt, Carsten; Krimmer, Robert Johannes; Lampoltshammer, Thomas J.Open Identity Summit 2021: Fachtagung vom 01.-02. Juni 2021 Copenhagen2021 / p. 223-228 https://dl.gi.de/server/api/core/bitstreams/ec03538d-b376-4537-bc0f-aab2936c74f8/content Conference Proceedings at Scopus Article at Scopus